patch 8.2.2035: MS-Windows: some tests may fail

Problem:    MS-Windows: some tests may fail.
Solution:   Avoid test failures. (Yegappan Lakshmanan, closes #7346)

src/testdir/test_ex_mode.vim

@@ -201,6 +201,7 @@ func Test_ex_mode_with_global()
   call assert_equal(1, RunVim([], [], '-e -s -S Xexmodescript'))
   call assert_equal(['done'], readfile('Xdidexmode'))
 
+  call delete('logfile')
   call delete('Xdidexmode')
   call delete('Xexmodescript')
 endfunc